Mobile is the new PC and AArch64 is the new x64

[Joakim]

On Tuesday, 13 November 2018 at 22:39:34 UTC, kinke wrote:
> On Tuesday, 13 November 2018 at 17:41:31 UTC, Joakim wrote:
>> No, benchmarks show the mobile i7 in last year's MBP as faster 
>> than your old desktop core i5, so the iPad Pro is faster than 
>> your desktop. :P Of course, the TDP of your desktop i5 is 
>> twice the mobile i7 and almost 10 times the A12X in the new 
>> iPad Pro, so Apple completely blows away Intel on the 
>> performance-to-power-dissipation ratio.
>
> While the last statement may hold some truth, I sure as hell 
> don't trust Geekbench numbers. And all ARM/x86 comparisons seem 
> to be based on that one little, highly controversial benchmark 
> suite.
>
> Their multicore results suggest a Ryzen 1950X outperforms an i7 
> 7700K by only 50%. A small testsuite of 8 real-world apps 
> (incl. raytracing, video encoding, compression) shows a min 
> gain of 80% and max gain of 200%, definitely averaging above 
> 100%: 
> https://www.computerbase.de/2018-08/amd-ryzen-threadripper-2990wx-2950x-test/2/#diagramm-blender-280
> As with any benchmark, your milage may vary, but a dedicated 
> multicore score apparently not scaling well at all makes me 
> wonder.

These broad benchmarks are indicative, but the best is obviously 
to try it out with your own software.

> Unless someone gives me hard numbers that their phone/tablet 
> can compile something like LLVM/LDC in a time anywhere near 
> their desktop CPU, I don't waste a second believing that a ~5W 
> CPU can match a 65+ W desktop one, even a 5-years old one like 
> mine. Laptops would surely already be shipping with these chips 
> if that was the case.

As my first post notes, 64-bit ARM laptops are now shipping and 
more are on the way:

https://www.anandtech.com/show/13498/samsung-unveils-galaxy-book2-12inch-snapdragon-850-with-x20-lte-20-hrs

https://wccftech.com/snapdragon-8180-new-details-octacore-soc/